doseSINGLE sim rom works for DUAL sim variants,,Help!!!

i have a problem with my mobile s6 dual sim international variant and i wanna try fresh instal as it may solve my problem

the mobile box tickets and if i dial *#1234# say model : SM-G920FD

but settings and odin mode say model : SM-G920F (as single sim)

so can i download the G920F rom for my mobile from sammobile

>>>>another Q about country >>>i bought my mobile from Qatar and i live in Egypt
i found many arab country variant including EGYPT / UAE / SAR but no Qatar

so can i download the 1 for Egypt .... it has the same PDA and CSC of my current version

thx ,,,